Powers/Abilities: Gundar was a ruthless leader
and strong warrior. As captain of a drakkar crew he had the power
to cast a curse upon his unfaithful underlings.

History:

(Tales of Suspense I#39 (fb)) - Gundar was the captain of a
drakkar, a viking ship. Gundar expected maximum obedience from
his men even if his orders were difficult to perform or cruel.

One day, some crewmen protested
against Gundar's orders and his rage exploded. He attacked his own men.
In the fight he broke his sword but kept fighting until the hilt was also
unusable. Unable to fight and overpowered by the number Gundar
cast a curse upon his crewmen.
He took a little boat and left for the
open sea pronouncing his curse: Having disobeyed his orders he
condemned his men to shipwreck on an island and remain prisoners there
until Gundar would return to free them.

(Tales of Suspense I#39 (fb) - BTS) - Gundar the Viking never returned to the island and died.

(Tales of Suspense I#39) - Centuries later, in the modern Era,
Gundar, a sailor descendentant of the original Gundar, casually arrived
on the island and freed the vikings from the curse.

Who banished the vikings to the island? Noticing the
hammer and the lightning it could have been Thor. On the other hand the crow
is typical of Odin. Was it Odin testing Mjolnir after its creation,
but before giving it to Thor, or was it a bearded Thor, guided by Hugin
or Munin to the place of the punishment?

Gunderland, Hyborian land of the northwestern hills of Aquilonia @ Savage Sword of Conan#43

Gunnar, Asgardian boy @ Thor I@351

Gunnar, sold ice creams @ Captain America V#7

or any other characters with a similar name.

Gundar's viking crew

The Vikings were warriors trained
for war, sailing and plundering, but the curse mutated them, granting them eternal life.

The Vikings were afraid of their
leader and were amazed when he attacked them. They did not exile him,
eventhough they had disobeyed the orders of their captain. They wer found guilty according to
the viking code and were cursed by their captain.

In fact, a storm had them shipwrecked on
an island where they lived alone for centuries, sure that they would
stay there until the end of the time, because Gundar was surely dead.

The arrival of a descendant of
Gundar freed them. The curse was broken and they were taken back home,
back in time.

--Tales of Suspense I#39

Gundar the descendant

Gundar was a normal man of the modern era, a sailor, like his ancestor was Gundar the warrior.

Gundar acast on an island was helped by men dressed like ancient vikings.

They were actually vikings and
told him about their curse. After they told their story they
started to disappear before Gundar's eyes because
Gundar's presence had freed them. Shortly after a ship passed near the
island and saved Gundar.